|
1
|
Usachov DY, Tarasov AV, Glazkova D, Mende M, Schulz S, Poelchen G, Fedorov AV, Vilkov OY, Bokai KA, Stolyarov VS, Kliemt K, Krellner C, Vyalikh DV. Insight into the Temperature-Dependent Canting of 4f Magnetic Moments from 4f Photoemission. J Phys Chem Lett 2023:5537-5545. [PMID: 37294735 DOI: 10.1021/acs.jpclett.3c01276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The orientation of the 4f moments offers an additional degree of freedom for engineering the spin-related properties in spintronic nanostructures of lanthanides. Yet, precise monitoring of the direction of magnetic moments remains a challenge. Here, on the example of the antiferromagnets HoRh2Si2 and DyRh2Si2, we investigate the temperature-dependent canting of the 4f moments near the surface. We demonstrate that this canting can be understood in the framework of crystal electric field theory and the exchange magnetic interaction. Using photoelectron spectroscopy, we disclose subtle but certain temperature-dependent changes in the line shape of the 4f multiplet. These changes are directly linked to the canting of the 4f moments, which is different for the individual lanthanide layers near the surface. Our results illustrate the opportunity to monitor the orientation of the 4f-moments with high precision, which is essential for development of novel lanthanide-based nanostructures, interfaces, supramolecular complexes, and single-molecule magnets for various applications.
Collapse
Affiliation(s)
- D Yu Usachov
- St. Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg, 199034, Russia
- Moscow Institute of Physics and Technology, Institute Lane 9, Dolgoprudny, 141701, Russia
- National University of Science and Technology MISIS, Moscow, 119049, Russia
| | - A V Tarasov
- St. Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg, 199034, Russia
- Moscow Institute of Physics and Technology, Institute Lane 9, Dolgoprudny, 141701, Russia
| | - D Glazkova
- St. Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg, 199034, Russia
| | - M Mende
- Institut für Festkörper- und Materialphysik, Technische Universität Dresden, Dresden D-01062, Germany
| | - S Schulz
- Institut für Festkörper- und Materialphysik, Technische Universität Dresden, Dresden D-01062, Germany
| | - G Poelchen
- Institut für Festkörper- und Materialphysik, Technische Universität Dresden, Dresden D-01062, Germany
| | - A V Fedorov
- Helmholtz-Zentrum Berlin für Materialien und Energie, Berlin 12489, Germany
| | - O Yu Vilkov
- St. Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg, 199034, Russia
| | - K A Bokai
- St. Petersburg State University, 7/9 Universitetskaya nab., St. Petersburg, 199034, Russia
| | - V S Stolyarov
- Moscow Institute of Physics and Technology, Institute Lane 9, Dolgoprudny, 141701, Russia
- National University of Science and Technology MISIS, Moscow, 119049, Russia
- Dukhov Research Institute of Automatics (VNIIA), Moscow, 127055, Russia
| | - K Kliemt
- Kristall- und Materiallabor, Physikalisches Institut, Goethe-Universität Frankfurt, Max-von-Laue Strasse 1, D-60438 Frankfurt am Main, Germany
| | - C Krellner
- Kristall- und Materiallabor, Physikalisches Institut, Goethe-Universität Frankfurt, Max-von-Laue Strasse 1, D-60438 Frankfurt am Main, Germany
| | - D V Vyalikh
- Donostia International Physics Center (DIPC), 20018 Donostia/San Sebastián, Basque Country, Spain
- IKERBASQUE, Basque Foundation for Science, Bilbao, 48013, Spain
| |
Collapse
|
|
2
|
Chappert C, Weiler D, Tang H, Scott J, Hopster H, Pappas D. In-Situ Magneto-Optical Kerr Effect of Epitaxial GD (0001). ACTA ACUST UNITED AC 2012. [DOI: 10.1557/proc-313-457] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
ABSTRACTWe have characterized magnetization loops of epitaxially grown Gd (0001) films on W (110) in the temperature range 145≤T≤300K. This was accomplished by measuring magneto-optical Kerr loops in UHV, in the transverse geometry, using a 2×10-4 deg sensitivity differential detector and He-Ne laser light.Films grown in the Stranski-Krastanov (SK) Mode (growth temperature 400°C) and films grown in a Frank-van-der-Merwe (FM) like Mode (growth temperature 20°C) behave significantly differently. While the room temperature grown films (FM) show square hysteresis behavior only after an annealing cycle to at least 300°C, the higher growth temperature (SK) leads to highly remanent films in the as grown state.The hysteresis behavior of these films is most important in conjunction with recently reported spin-polarized photoemission results, which showed that the growth temperature and therefore the film morphology has a strong influence on the surface magnetic reconstruction of Gd (0001) [1].
Collapse
|
|
3
|
Arnold CS, Pappas DP. Gd(0001): A semi-infinite three-dimensional heisenberg ferromagnet with ordinary surface transition. PHYSICAL REVIEW LETTERS 2000; 85:5202-5205. [PMID: 11102221 DOI: 10.1103/physrevlett.85.5202] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2000] [Indexed: 05/23/2023]
Abstract
By comparing the surface and bulk magnetization of smooth, well-ordered Gd samples, we show that the surface has an ordinary transition, i.e., a common Curie temperature for surface and bulk. A quantitative statistical analysis of the temperature dependent magnetization is presented. Critical exponents for both surface, beta(S) = 0.83+/-0.04, and bulk, beta(B) = 0.376+/-0.015, are consistent with the semi-infinite three-dimensional Heisenberg model with homogeneous exchange.
Collapse
Affiliation(s)
- CS Arnold
- National Institute of Standards and Technology, Boulder, Colorado 80305-3328, USA
| | | |
Collapse
|